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Differential thermal analyzer
Also known as DTA, in its abbreviated form . It measures the temperature difference between a reference substance and a sample by simultaneous heating, offering insight into the thermal properties of the sample. When substances change phase during heating or thermal decomposition takes place, they either absorb or discard heat . Therefore, if the reference substance and the sample are exposed to the same amount of heat for a certain time , the temperature difference between the two materials can be measured and the thermal behavior of the sample can be analyzed. This device is used to detect structural changes and melting temperature of a solder alloy as well as to analyze the reaction behavior of different fluxing agents as temperature increases . DTA curves are also known as thermograms . Naturally, the galvanometer will deflect in different directions , depending on whether the reaction is endothermic or exothermic .